Treating artificial filaments



g- 1939. H. G. VAN DER WAALS ET AL 71,485

TREATING ARTIFICIAL FILAMENTS Filed March 16, 1953 INVENTORS. HEN 0,9 l/( 6. //4/vpz- P W444 J ATTORNEY.

Patented Aug. 29, 1939 EJ53 485 UNITED STATEE FATENT QFFiQE TREATING ARTIFICIAL FILAMENTS Hendrik Gerardus van der Waals and George Ephraim Jacob Wiessing, Arnhem, Netherlands, assigners, by mesne assignments, to American Enka Corporation, Wilmington, Del., a corporation of Delaware Application March 16, 1933, Serial No. 661,084 In Germany March 21, 1932 2 Claims. (Cl. 188) This invention relates to filaments, particularly tegrally formed therewith projecting portions 7 of artificial material such as artificial silk. The facing inwardly. In Figure 2 there is illustrated invention further relates to the production of a a device similar to Figure 1 with the difference body of artificial filaments embodying improvethat instead of integrally formed projecting por- 6 ments over those heretofore known. tions there are provided portions 8 held to the 5.

In the practice heretofore it has been customring by screws 9. ary to produce bodies of artificial filaments in In Figure 3 there is provided a pot l and the form of aring of circular cross-sections. The separate and distinct therefrom is a corrugated freshly spun filaments were formed into the cirmember ii] of any suitable material such as met- 10 cular body and then permitted to dry. In the al, molded rubber or the like. Preferably the i0 drying process there was a shrinking which member ID is elastic so that it can be readily incaused pressure on the various windings because serted into and removed from the pot I.

of the resistance of the inner windings to the In Figure 4 is shown a similar arrangement pressure created by the greater shrinkage of the wherein instead of a single corrugated member outer windings. The present invention is intend- Hi there are provided two such members H and 15 ed to obviate the disadvantages of the prior art [2 which when fitted together within the not i and to provide an apparatus and a process wheretouch each other at points i3 and M. Figure 5 by a new and improved form of body is produced shows a similar arrangement in which there are having advantages not inherent in the old forms. members I5 and i6 secured together at point In producing this invention we provide a spin- I! by a hinge in order that when removed from 2) ning pot, the inner surface of which is non-cirpot I, the members I5 and 56 may be opened cular. Preferably the inner surface has one or and the body of filaments more readily removed. more inwardly projecting portions which may be Figure 6 shows a similar device in which the of greater or lesser extent. The freshly formed member [8 is of molded material such as rubg5 artificial filaments are spun against this surface ber, and preferably molded in a relatively fiat and the body so formed is removed. position and split at point IS. The member E8 Upon shrinkage of the outer layers the preshas a tendency to flatten out when removed sure caused thereby is taken up by reason of from pot I and thus to readily release the body the fact that the body has an outline which is of filaments.

non-circular so that the pressure tends to cause In use we may set the spinning pot in a suit- 30 the body to assume a circular shape and thus able apparatus and cause the filaments to be minimize or even eliminate the pressure due to spun against the interior surface thereof by censhrinkage. There may be both a yielding of the trifugal force to form a body such as shown in inner windings by reason of the irregular form Figures 7 and 8. The body is removed from the thereof, or an equalization of the pressure of the spinning pot in any well known manner. In 35 several layers by the compensated shrinkage of Figure '7 the body 26 is shown as having a pluthe inwardly projecting portions of the body. rality of outwardly extending projections 2| and In the accompanying drawing constituting a corresponding projections 22 on the inner surpart hereof and in which like reference characface thereof. In Figure 8 the body 28 has simi- 0 ters indicate like parts; lar projections 2|, but of lesser prominence than 40 Figure l is an end view of one form of a. spinin Figure '7 and the inner surface 23 is substanping pot made in accordance with this inventially circular. By reason of the shape when a tion and adapted for use to produce the desired body of freshly spun filaments shrinks, the form of body of artificial filaments; shrinkage of portions 2| will cause a yielding of Figures 2, 3, 4, 5 and 6 are similar views of portions 22 and thus avoid excess pressure on modified forms of spinning pots illustrating some the body as a whole. The shrinkage of portions of the many forms which the apparatus may as- 2! will be partially compensated for by the sume in accordance with this invention, and shrinkage in the reverse direction of the inward- Figures '7 and 8 are end views of two forms of ly extending portions 24 between portions 2|- bodies of artificial filaments adapted to be pro- Although we have described our invention set- 50 duced by the present invention. ting forth various embodiments thereof, the in- The spinning apparatus consists essentially of vention is not to be limited by the specific exampot I from the inner surface of which projections ples, as said examples merely illustrate the many 2 face inwardly. In Figure 1 there is provided forms of the present invention. Spinning pots a pot 1 into which is fitted a ring 6 having inmay be made of Various metals, such as aluminum, nickel, steels, rubber, artificial resins, Celluloid and the like. It is desirable that the surfaces coming in contact with the artificial filaments be of acid proof material and for this purpose various metals which are not acid proof may be furnished with a protective coating. In some cases where a solid member is used for the spinning pot as in Figures 1 and 2, a lining of soft rubber may be provided in order to firmly hold the body of filaments together when removed from the pot and at the same time allowing ready removal of the pot from the lining. The number of projections may be made greater or smaller and they may be of greater or lesser prominence. These and other changes may be made in our invention the scope of which is set forth in the claims appended hereto.

What we claim is:

1. An apparatus for collecting artificial silk comprising in combination a spinning pot which is circular in cross-section and a member of generally similar cross-section located within the pot and being of substantially the same height as the inner wall thereof but unattached to said inner wall, the member being provided with recesses in its outer wall to form spaces between the inner wall of the pot and the corrugated member to facilitate simultaneously removal of the member with a thread package formed contraction would otherwise occur whereby when the package is formed and dried, uniform shrinkage is produced.

2. An apparatus for collecting artificial silk comprising in combination a spinning pot which is circular in cross-section and a resilient member of generally similar cross-section located therein and being separable at at least one point which provides ends abutting each other, said member being unattached to the inner wall of the pot and readily removable therefrom and being of substantially the same height as said inner wall, the said member having inwardly projecting portions of such conformation as to produce a corrugated, endless inner embracing wall surface to form corrugations of sufficient size and shape to introduce slack throughout all parts of the thread package wherein resistance to contraction would otherwise-occur whereby when the package is formed and dried, uniform shrinkage is produced.

HENDRIK GERARDUS VAN DER WAALS.

GEORGE EPHRAIM JACOB WIESSING. 

